package day10;

import static java.lang.Math.*;
public class Demo03 {
    public static void main(String[] args) {
        /*
         * Java静态import
         */
        double r = 30;
        double area =  PI * pow(r, 2);
        double s = sin(PI);
        double ss = Math.sin(Math.PI);
        System.out.println(area);
        System.out.println(s);
        System.out.println(ss);
    }
}
